You can tell whether a last name is French or not. How do you teach your programs to recognize French last names? Here's an attempt. We haven't really covered other French names like LaMarre or François yet. Those will be in future French-regonition regular expressions.

For all of you who have Blue Cross Blue Shield insurance coverage (not Federal, though)- check out your insurance cards! It ALWAYS begins with 3 letters (called the alpha prefix) and a series of alpha-numeric characters ranging from 8 to 12 digits.

From experience and what I've been told, last names ending in -ian are most likely of Armenian origin. There could be some other foreign names that pass this pattern. Also, not every Armenian has a last name that ends in -ian. -ian is just common enough to stereotype.

How do you tell whether a last name is of Dutch origin? This pattern captures the -enga's, -stra's, and -ema's. There are also other Dutch names that don't end with these three "suffixes" but you know it's Dutch if it ends with either of those three.

I noticed that a last name is Portuguese if it ends in -eira, -eiro, -nha, or -nho. I know there are other Portuguese names that don't end with these, but I haven't yet come across any other foreign last names (besides Portuguese/Brazilian) that end in those 4.

Flight numbers have two parts: The first 2 characters denote the airline's two-letter code. This airline code MUST be either letter-letter, number-letter, or letter-number, NEVER number-number. The 3rd digit has to be a numeric digit from 1 to 9 inclusive. After this 3rd digit, we may append any integer from 0 to 999.

Legend has it that if a last name ends in -man or -berg, the person who has that last name is Jewish. Of course there are Jewish people whose names don't follow the pattern, and there could be those whose last names end in -man or -berg who are not Jewish (or are they and they don't just know it?).

This is how a composer catalogued his or her musical works in classical music, except for Bach (who used BWV) and Mozart (who used K.). There may have been others. However, most other composers used the format Opus x, Number y. Sometimes, it's just Opus x if it's a big work like a concerto or a symphony.

Yes, bra sizes can also be tested by regular expressions. The numeric digits represent the rib cage circumference, measured under the breast excluding the breast. It MUST be an even number. The letters determine the cup size - AA is the smallest, H (and beyond, which this regular expression does not represent) is the largest. In summary, the cup sizes are determined by the "full chest circumference" (which includes the breast) MINUS the rib cage circumference. Smaller differences are closer to A and larger differences are closest to DDD or F